------------[ cut here ]------------ WARNING: CPU: 1 PID: 7441 at kernel/rcu/tree.c:773 rcu_irq_exit+0x15/0x20 kernel/rcu/tree.c:773 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 7441 Comm: kworker/1:3 Not tainted 5.9.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events pwq_unbound_release_workfn Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:231 __warn.cold+0x20/0x4a kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:rcu_irq_exit+0x15/0x20 kernel/rcu/tree.c:773 Code: 11 fd ff ff 5b 5d c3 0f 0b e9 7c ff ff ff 0f 0b eb 91 0f 1f 00 8b 05 56 15 be 02 85 c0 74 0d 65 8b 05 8b 59 0d 78 85 c0 74 02 <0f> 0b e9 34 ff ff ff 0f 1f 40 00 41 54 55 48 c7 c5 40 6c 03 00 53 RSP: 0018:ffffc90008b3f7d8 EFLAGS: 00010002 RAX: 0000000000000001 RBX: 0000000000000086 RCX: ffffffff817a2957 RDX: ffff888094cee380 RSI: ffffffff81622021 RDI: 0000000000000005 RBP: 0000000000000001 R08: 0000000000000000 R09: ffff8880ae736d23 R10: 0000000000000000 R11: 0000000034343754 R12: 0000000000000000 R13: 000000000003ad04 R14: 000000000000003c R15: dffffc0000000000 rcu_irq_exit_irqson+0x76/0x140 kernel/rcu/tree.c:828 trace_console_rcuidle include/trace/events/printk.h:10 [inline] call_console_drivers kernel/printk/printk.c:1809 [inline] console_unlock+0x967/0xf30 kernel/printk/printk.c:2501 vprintk_emit+0x2fd/0x770 kernel/printk/printk.c:2029 vprintk_func+0x8f/0x1a6 kernel/printk/printk_safe.c:393 printk+0xba/0xed kernel/printk/printk.c:2078 report_bug.cold+0x72/0xb3 lib/bug.c:194 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:rcu_irq_enter+0x15/0x20 kernel/rcu/tree.c:1058 Code: 00 00 00 4c 89 e7 e8 9a 00 c0 f9 eb b4 0f 0b eb 8b 0f 1f 40 00 8b 05 96 14 be 02 85 c0 74 0d 65 8b 05 cb 58 0d 78 85 c0 74 02 <0f> 0b e9 44 ff ff ff 0f 1f 40 00 53 48 c7 c3 40 6c 03 00 e8 43 08 RSP: 0018:ffffc90008b3faf8 EFLAGS: 00010002 RAX: 0000000000000001 RBX: 0000000000000086 RCX: ffffffff817a2957 RDX: ffff888094cee380 RSI: ffffffff816222a1 RDI: 0000000000000005 RBP: ffffffff8cb4ce48 R08: 0000000000000000 R09: ffffffff8ab2960f R10: 0000000000000000 R11: 0000000000000160 R12: 0000000000000086 R13: ffffffff87f74a26 R14: 0000000000000001 R15: ffffffff89bd69c0 rcu_irq_enter_irqson+0x76/0x140 kernel/rcu/tree.c:1073 trace_irq_disable_rcuidle include/trace/events/preemptirq.h:36 [inline] trace_irq_disable_rcuidle include/trace/events/preemptirq.h:36 [inline] trace_hardirqs_off kernel/trace/trace_preemptirq.c:82 [inline] trace_hardirqs_off+0x114/0x210 kernel/trace/trace_preemptirq.c:74 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] _raw_spin_lock_irqsave+0x66/0xc0 kernel/locking/spinlock.c:159 debug_object_activate+0x12e/0x3e0 lib/debugobjects.c:636 debug_rcu_head_queue kernel/rcu/rcu.h:176 [inline] __call_rcu kernel/rcu/tree.c:2880 [inline] call_rcu+0x2c/0x7e0 kernel/rcu/tree.c:2968 lockdep_unregister_key+0x21d/0x570 kernel/locking/lockdep.c:5686 wq_unregister_lockdep kernel/workqueue.c:3461 [inline] pwq_unbound_release_workfn+0x227/0x2d0 kernel/workqueue.c:3693 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Kernel Offset: disabled